.grid-bg {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: repeating-linear-gradient(
    to right,
    rgba(0, 255, 255, 0.1) 0px,
    rgba(0, 255, 255, 0.1) 1px,
    transparent 1px,
    transparent 40px
  ),
  repeating-linear-gradient(
    to bottom,
    rgba(0, 255, 255, 0.1) 0px,
    rgba(0, 255, 255, 0.1) 1px,
    transparent 1px,
    transparent 40px
  );
  background-color: var(--background-color);
  z-index: -4;
}